DE69023170T2 - Magnetic carrier for longitudinal recording. - Google Patents

Magnetic carrier for longitudinal recording.

Info

Publication number
DE69023170T2
DE69023170T2 DE69023170T DE69023170T DE69023170T2 DE 69023170 T2 DE69023170 T2 DE 69023170T2 DE 69023170 T DE69023170 T DE 69023170T DE 69023170 T DE69023170 T DE 69023170T DE 69023170 T2 DE69023170 T2 DE 69023170T2
Authority
DE
Germany
Prior art keywords
magnetic
magnetic carrier
longitudinal recording
layer
track
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69023170T
Other languages
German (de)
Other versions
DE69023170D1 (en
Inventor
Michael L Mallary
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Quantum Corp
Original Assignee
Quantum Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Quantum Corp filed Critical Quantum Corp
Application granted granted Critical
Publication of DE69023170D1 publication Critical patent/DE69023170D1/en
Publication of DE69023170T2 publication Critical patent/DE69023170T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less

Abstract

The magnetic medium includes a magnetic under image layer which may be separated from the hard magnetic recording layer by a nonmagnetic buffer layer. Virtual magnetic images induced in the magnetic image layer reduce off-track magnetization seen by the recording head. Thus, interference caused by tracks adjacent to the track being read is reduced.
DE69023170T 1989-06-12 1990-05-14 Magnetic carrier for longitudinal recording. Expired - Fee Related DE69023170T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/364,900 US5176965A (en) 1987-10-05 1989-06-12 Magnetic medium for longitudinal recording

Publications (2)

Publication Number Publication Date
DE69023170D1 DE69023170D1 (en) 1995-11-30
DE69023170T2 true DE69023170T2 (en) 1996-04-18

Family

ID=23436583

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69023170T Expired - Fee Related DE69023170T2 (en) 1989-06-12 1990-05-14 Magnetic carrier for longitudinal recording.

Country Status (5)

Country Link
US (2) US5176965A (en)
EP (1) EP0403076B1 (en)
JP (1) JPH0775070B2 (en)
AT (1) ATE129590T1 (en)
DE (1) DE69023170T2 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5587235A (en) * 1993-02-19 1996-12-24 Hitachi, Ltd. Magnetic recording medium and magnetic recording apparatus
US5851643A (en) * 1993-11-11 1998-12-22 Hitachi, Ltd. Magnetic recording media and magnetic recording read-back system which uses such media
US5750270A (en) * 1995-02-07 1998-05-12 Conner Peripherals, Inc. Multi-layer magnetic recording media
US5830590A (en) * 1996-06-28 1998-11-03 Ampex Corporation Magnetic storage and reproducing system with a low permeability keeper and a self-biased magnetoresistive reproduce head
US5861220A (en) * 1996-08-06 1999-01-19 Ampex Corporation Method and apparatus for providing a magnetic storage and reproducing media with a keeper layer having a longitudinal anisotropy
US5843565A (en) * 1996-10-31 1998-12-01 Ampex Corporation Particulate magnetic medium utilizing keeper technology and methods of manufacture
US6031682A (en) * 1997-07-14 2000-02-29 Iomega Corporation Track trimming and orthogonal recording for cartridge tape
US6495252B1 (en) * 1999-07-22 2002-12-17 Seagate Technology Llc Magnetic recording medium with superparamagnetic underlayer
JP2002288817A (en) * 2001-03-26 2002-10-04 Fuji Photo Film Co Ltd Magnetic recording medium
US6842313B1 (en) 2002-04-08 2005-01-11 Maxtor Corporation Floating down stream perpendicular write head shield
US7729092B1 (en) 2002-11-07 2010-06-01 Seagate Technology Llc Shielded pole writer under reader
US7149045B1 (en) 2002-11-07 2006-12-12 Maxtor Corporation Longitudinal media with soft underlayer and perpendicular write head
US7075756B1 (en) 2002-11-07 2006-07-11 Maxtor Corporation Shielded pole writer
US7189583B2 (en) 2003-07-02 2007-03-13 Micron Technology, Inc. Method for production of MRAM elements
US7092209B2 (en) * 2004-03-01 2006-08-15 Hitachi Global Storage Technologies Netherlands B.V. Longitudinal magnetic recording using magnetic media with a soft underlayer
US7927724B2 (en) 2004-05-28 2011-04-19 Hitachi Global Storage Technologies Netherlands B.V. Magnetic recording media with orthogonal anisotropy enhancement or bias layer
US7425377B2 (en) * 2005-02-04 2008-09-16 Hitachi Global Storage Technologies Netherlands B.V. Incoherently-reversing magnetic laminate with exchange coupled ferromagnetic layers
JP4113879B2 (en) * 2005-02-04 2008-07-09 Ｔｄｋ株式会社 Perpendicular magnetic recording head and magnetic recording apparatus

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1153069B (en) * 1960-02-06 1963-08-22 Grundig Max Arrangement for recording any signals with a transverse magnetization magnetic head
US3393982A (en) * 1962-11-08 1968-07-23 Ncr Co Ferromagnetic storage devices having uniaxial anisotropy
FR1438563A (en) * 1965-04-02 1966-05-13 Bull General Electric Improvements to coupled ferromagnetic blades or layers
FR2428886A1 (en) * 1978-06-13 1980-01-11 Cii Honeywell Bull MAGNETIC INFORMATION MEDIUM WITH PERPENDICULAR RECORDING
JPS5771518A (en) * 1980-10-22 1982-05-04 Dainippon Printing Co Ltd Magnetic recording medium
JPS5864634A (en) * 1981-10-13 1983-04-18 Hitachi Maxell Ltd Magnetic recording medium
JPS58129032A (en) * 1982-01-28 1983-08-01 Toyo Tire & Rubber Co Ltd Composition for pneumatic tire
US4621030A (en) * 1982-07-19 1986-11-04 Hitachi, Ltd. Perpendicular magnetic recording medium and manufacturing method thereof
JPS5972644A (en) * 1982-10-19 1984-04-24 Nec Corp Magnetic double layer recording medium
JPH061729B2 (en) * 1983-01-17 1994-01-05 株式会社日立製作所 Magnetic film and magnetic head using the same
JPS6052919A (en) * 1983-09-01 1985-03-26 Nec Corp Vertical magnetic recording medium and its production
US4687712A (en) * 1983-12-12 1987-08-18 Matsushita Electric Industrial Co., Ltd. Vertical magnetic recording medium
JPH0622170B2 (en) * 1983-12-16 1994-03-23 株式会社日立製作所 Magnetic head
DE3346876A1 (en) * 1983-12-23 1985-07-11 Siemens AG, 1000 Berlin und 8000 München COMBINED WRITING AND READING MAGNET HEAD FOR THE UPPER MAGNETIZATION OF AN APPROPRIATE RECORDING MEDIA
DE3566848D1 (en) * 1984-05-04 1989-01-19 Siemens Ag Thin-layer double-gap magnetic head for a perpendicularly magnetized recording medium
JPS6199932A (en) * 1984-10-19 1986-05-19 Sony Corp Production of vertical magnetic recording medium
AU581701B2 (en) * 1984-10-31 1989-03-02 Inverness Medical Switzerland Gmbh Apparatus for use in electrical, e.g. electrochemical, measurement procedures, and its production and use, and composite assemblies incorporating the apparatus
US4656546A (en) * 1985-01-22 1987-04-07 Digital Equipment Corporation Vertical magnetic recording arrangement
JPS61177633A (en) * 1985-01-31 1986-08-09 Fujitsu Ltd Production of vertical magnetic recording medium
JPS61187125A (en) * 1985-02-14 1986-08-20 Hitachi Ltd Method for orientating magnetic field of magnetic disk
US4729805A (en) * 1985-03-14 1988-03-08 Minnesota Mining And Manufacturing Company Recording medium annealing process
US4677032A (en) * 1985-09-23 1987-06-30 International Business Machines Corporation Vertical magnetic recording media with multilayered magnetic film structure
US4735840A (en) * 1985-11-12 1988-04-05 Cyberdisk, Inc. Magnetic recording disk and sputtering process and apparatus for producing same
JPS62204429A (en) * 1986-03-04 1987-09-09 Nippon Hoso Kyokai <Nhk> Magnetic recording medium and magnetic head
EP0333843B1 (en) * 1987-10-05 1993-02-10 Digital Equipment Corporation Magnetic medium for longitudinal recording

Also Published As

Publication number Publication date
US5431969A (en) 1995-07-11
JPH0363932A (en) 1991-03-19
EP0403076A2 (en) 1990-12-19
EP0403076B1 (en) 1995-10-25
ATE129590T1 (en) 1995-11-15
JPH0775070B2 (en) 1995-08-09
EP0403076A3 (en) 1991-07-03
US5176965A (en) 1993-01-05
DE69023170D1 (en) 1995-11-30

Similar Documents

Publication Publication Date Title
DE69023170D1 (en) Magnetic carrier for longitudinal recording.
BR8500630A (en) STRUCTURE OF VERTICAL READING-RECORDING HEADS OF GEMINATED TRAIL AND POLARIZATION METHOD OF COUPLED VECTORS
ATE161996T1 (en) FORMAT-INDEPENDENT, HARD DRIVE FOR DIGITAL MAGNETIC DISK ARRANGEMENT WITH LOCAL WRITE/READ IMPROVEMENTS
EP0439278A3 (en) Method and apparatus for recording data transitions
EP0155817A3 (en) Method of pre-recording tracking information on magnetic media
MY105796A (en) Longitudinal magnetic-tape recording system, magnetic-tape apparatus for use in the system, and magnetic head for use in the magnetic-tape apparatus
EP1286339A3 (en) Writer for head positioning information over recording medium
DE69531222D1 (en) Magnetoresistive removable hard disk magazine and disk drive and embedded quadrature servo bursts
EP0265665A3 (en) Twin track magnetic data read-write head improving track misregistration effects in twin track vertical recording
JPS56134365A (en) Recording system for head positioning information
JPS57166659A (en) Magnetic disk device
EP0097975A3 (en) Magnetic head for a perpendicular read/write arrangement
KR880701512A (en) System and method for improving image quality during video tape shuttle
ATE97253T1 (en) ARRANGEMENT FOR RECORDING OR REPRODUCTION OF AN ELECTRICAL SIGNAL.
ATE154153T1 (en) READING/WRITING DEVICE FOR MAGNETIC CARD
GB1504466A (en) Magnetic card recording and/or reproducing apparatus
JPS5687274A (en) Data recording and reproducing system of magnetic recorder and reproducer
BR8705266A (en) MAGNETIC NUCLEUS STRUCTURE FOR TRANSDUCTIVE HEADS AND MAGNETIC FLOW TRANSITIONS READING AND RECORDING PROCESS ON MAGNETICALLY RECORDABLE SUPPORT
JPS56159805A (en) Magnetic recording and reproducing system
KR880014512A (en) Recorder with track guide
JPS6455710A (en) Magnetic head
JPS54128308A (en) Magnetic disc device
JPS5522224A (en) Digital recording device
JPS57105871A (en) Cleaning system for disc device
DE69012849T2 (en) Arrangement for reproducing an electrical signal.

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee